Question

How many dollars does 3 bottles of water cost ?

Answer 1

Answer:

$7.5

Step-by-step explanation:

if we set up the proportion $\frac{10}{4} =\frac{x}{3}$   with cost on top and water bottles on bottom, we can divide  10/4 too get 2.5, which we can then multiply by 3 to get our x value, 7.5.